Full Stokes Polarimeter for Chromospheric Measurements with SOLIS/VSM
1122 views
09.09.2015
Co-author
Jack Harvey
Affiliation
NSO, Tucson, AZ, USA
Main category
Natural Sciences (Astrophysics and Astrononmy)
Alternative category
Natural Sciences (Physics)
Abstract
SOLIS stands for Synoptic Optical Long-term Investigations of the Sun. Daily fulldisk magnetic fields measurements of the Sun are being done for several decades at NSO Kittpeak. The SOLIS/VSM instrument replaced earlier instruments at Kitt Peak. The current SOLIS/VSM instrument has capability to make full Stokes polarimetry in photospheric lines, however, for chromosphere only longitudinal polarimetry exists. With the recent progress in non-LTE inversions of the chromospheric spectra it was decided that a full Stokes polarimeter needs to be developed. Based on similar design to photospheric modulator we have developed a separate modulator for chromospheric full Stokes measurements using Ca II 854.2 nm line. We will present design and performance of the new modulator and possibly sample observations.
Further information
Further reading
Language
DOI
10.18147/smn.2015/presentation:29
Conference
Do you have problems viewing the pdf-file? Download presentation here
If the presentation contains inappropriate content, please report the presentation. You will be redirected to the landing page.